45 lines
1.0 KiB
Python
45 lines
1.0 KiB
Python
import fileinput
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import json
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from functools import cmp_to_key
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from typing import Any
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def main() -> None:
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pairs = []
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pair: list[list[Any]] = []
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packets = [[[2]], [[6]]]
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for line in fileinput.input():
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if not line.strip():
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pairs.append(pair)
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pair = []
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else:
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obj = json.loads(line)
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pair.append(obj)
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packets.append(obj)
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pairs.append(pair)
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def cmp(xs: list[Any] | int, ys: list[Any] | int) -> int:
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if isinstance(xs, int) and isinstance(ys, int):
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return (xs > ys) - (xs < ys)
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if isinstance(xs, int):
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xs = [xs]
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if isinstance(ys, int):
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ys = [ys]
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for x, y in zip(xs, ys):
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if result := cmp(x, y):
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return result
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return (len(xs) > len(ys)) - (len(xs) < len(ys))
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print(sum(i + 1 for i, (xs, ys) in enumerate(pairs) if cmp(xs, ys) == -1))
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packets.sort(key=cmp_to_key(cmp))
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print((packets.index([[2]]) + 1) * (packets.index([[6]]) + 1))
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main()
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